diff --git a/src/FieldDefinitionForm.tsx b/src/FieldDefinitionForm.tsx
index cbedb39..e8aeb42 100644
--- a/src/FieldDefinitionForm.tsx
+++ b/src/FieldDefinitionForm.tsx
@@ -1,5 +1,6 @@
 /**
- * Shared label + type editor for add-field and edit-field flows (CE-WP-0007-T10/T11).
+ * Shared key + type editor for add/edit attribute flows
+ * (CE-WP-0007-T10/T11; CE-WP-0010 attributes vocabulary).
  * Styled to match EvidenceFormBody / InlineCaptureForm.
  */
 
@@ -48,7 +49,7 @@ export function FieldDefinitionForm(p: FieldDefinitionFormProps) {
         <div style={{ marginBottom: 6, fontWeight: 600 }}>{p.badge}</div>
       )}
       <label style={labelStyle} htmlFor={`${p.testidPrefix}-label`}>
-        Field label
+        Attribute key
       </label>
       <input
         id={`${p.testidPrefix}-label`}
@@ -59,7 +60,7 @@ export function FieldDefinitionForm(p: FieldDefinitionFormProps) {
         style={inputStyle}
       />
       <label style={labelStyle} htmlFor={`${p.testidPrefix}-type`}>
-        Field type
+        Attribute type
       </label>
       <select
         id={`${p.testidPrefix}-type`}
diff --git a/src/FormRenderer.dom.test.tsx b/src/FormRenderer.dom.test.tsx
index ee52ec1..7e6c78f 100644
--- a/src/FormRenderer.dom.test.tsx
+++ b/src/FormRenderer.dom.test.tsx
@@ -26,7 +26,7 @@ import {
 
 const SCHEMA: FormSchema = {
   id: "demo",
-  title: "Demo form",
+  title: "Attributes",
   fields: [
     { type: "textarea", id: "summary", label: "Summary" },
     { type: "date", id: "deadline", label: "Deadline" },
@@ -59,11 +59,12 @@ describe("FormRenderer (CE-WP-0003-T04)", () => {
     cleanup();
   });
 
-  it("renders each schema field with its label", () => {
+  it("renders each schema field with key (type) labels", () => {
     renderWithProviders({ schema: SCHEMA });
-    expect(screen.getByLabelText("Summary")).toBeTruthy();
-    expect(screen.getByLabelText("Deadline")).toBeTruthy();
-    expect(screen.getByLabelText("Amount")).toBeTruthy();
+    expect(screen.getByLabelText(/Summary \(textarea\)/)).toBeTruthy();
+    expect(screen.getByLabelText(/Deadline \(date\)/)).toBeTruthy();
+    expect(screen.getByLabelText(/Amount \(text\)/)).toBeTruthy();
+    expect(screen.getByRole("heading", { name: "Attributes" })).toBeTruthy();
   });
 
   it("registers each field with the rect registry as kind=field", () => {
@@ -79,7 +80,7 @@ describe("FormRenderer (CE-WP-0003-T04)", () => {
     const user = userEvent.setup();
     const { events, ctxValue } = renderWithProviders({ schema: SCHEMA });
     cleanupCtx = () => ctxValue.observer.disconnect();
-    await user.click(screen.getByLabelText("Summary"));
+    await user.click(screen.getByLabelText(/Summary/));
     const fieldEvents = events.filter((e) => e.type === "FormFieldActivated");
     expect(fieldEvents).toHaveLength(1);
     expect(fieldEvents[0]).toMatchObject({
@@ -95,13 +96,29 @@ describe("FormRenderer (CE-WP-0003-T04)", () => {
       onValueChange: (id, value) => changes.push([id, value]),
     });
     cleanupCtx = () => ctxValue.observer.disconnect();
-    await user.type(screen.getByLabelText("Amount"), "42");
+    await user.type(screen.getByLabelText(/Amount/), "42");
     expect(changes).toEqual([
       ["amount", "4"],
       ["amount", "2"],
     ]);
   });
 
+  it("filters attributes when the query has 3+ characters", async () => {
+    const user = userEvent.setup();
+    const { ctxValue } = renderWithProviders({
+      schema: SCHEMA,
+      values: { amount: "1500 EUR" },
+    });
+    cleanupCtx = () => ctxValue.observer.disconnect();
+    const filter = screen.getByTestId("attributes-filter");
+    await user.type(filter, "am");
+    expect(document.querySelector('[data-field-id="summary"]')).not.toBeNull();
+    expect(document.querySelector('[data-field-id="amount"]')).not.toBeNull();
+    await user.type(filter, "o"); // "amo" — matches Amount
+    expect(document.querySelector('[data-field-id="summary"]')).toBeNull();
+    expect(document.querySelector('[data-field-id="amount"]')).not.toBeNull();
+  });
+
   it("renders the link-count chip when linkCounts[fieldId] > 0", () => {
     const { ctxValue } = renderWithProviders({
       schema: SCHEMA,
diff --git a/src/FormRenderer.tsx b/src/FormRenderer.tsx
index 6701ed6..f27e1d4 100644
--- a/src/FormRenderer.tsx
+++ b/src/FormRenderer.tsx
@@ -1,15 +1,23 @@
 /**
- * FormRenderer — renders a FormSchema as a small evidence-backed form.
+ * FormRenderer — renders a FormSchema as evidence-backed attributes.
  *
- * Each field registers itself with the rect registry under
- * `kind="field"` and the field's `id`, so the SVG visual guide (T07) can
- * draw curves from the active field to its linked evidence card and on
- * to the source highlight.
+ * Each attribute registers itself with the rect registry under
+ * `kind="field"` and the field's `id`, so the SVG visual guide can
+ * draw curves from the active attribute to its linked evidence card and
+ * on to the source highlight.
  *
- * CE-WP-0007-T10/T11: add-field and edit-field flows use FieldDefinitionForm.
+ * CE-WP-0007-T10/T11: add/edit flows use FieldDefinitionForm.
+ * CE-WP-0010: user-facing "Attributes" vocabulary, `Key (type)` labels,
+ * and a ≥3-character filter next to the caption.
  */
 
-import { useRef, useState, type ChangeEvent, type CSSProperties } from "react";
+import {
+  useMemo,
+  useRef,
+  useState,
+  type ChangeEvent,
+  type CSSProperties,
+} from "react";
 
 import type { EvidenceTarget } from "@citation-evidence/engine/shared";
 
@@ -17,6 +25,8 @@ import { FieldDefinitionForm, type FieldType } from "./FieldDefinitionForm";
 import { useActiveState, type ActiveState } from "./state/active";
 import { useRegisterRect } from "./visual-guide/react-hooks";
 
+const FILTER_MIN_CHARS = 3;
+
 function isFieldActive(state: ActiveState, fieldId: string): boolean {
   return (
     state.activeTarget?.targetType === "form-field" &&
@@ -24,6 +34,18 @@ function isFieldActive(state: ActiveState, fieldId: string): boolean {
   );
 }
 
+/** Case-insensitive substring match; empty / short queries match everything. */
+export function matchesTextFilter(
+  query: string,
+  parts: readonly (string | undefined | null)[],
+  minChars = FILTER_MIN_CHARS,
+): boolean {
+  const q = query.trim();
+  if (q.length < minChars) return true;
+  const needle = q.toLowerCase();
+  return parts.some((p) => p != null && String(p).toLowerCase().includes(needle));
+}
+
 export interface FormFieldSchema {
   readonly type: "text" | "textarea" | "date";
   readonly id: string;
@@ -113,8 +135,8 @@ function FieldRow({
           onChangeType={onChangeEditType}
           onSave={onSaveEdit}
           onCancel={onCancelEdit}
-          saveLabel="Save field"
-          badge="Editing field"
+          saveLabel="Save attribute"
+          badge="Editing attribute"
           testidPrefix={`field-edit-${field.id}`}
         />
       </div>
@@ -147,9 +169,9 @@ function FieldRow({
     >
       <button
         type="button"
-        aria-label={`Edit field ${field.label}`}
+        aria-label={`Edit ${field.id}`}
         data-testid={`field-edit-toggle-${field.id}`}
-        title="Edit field label and type"
+        title="Edit attribute key and type"
         onClick={(e) => {
           e.stopPropagation();
           onBeginEdit();
@@ -174,7 +196,8 @@ function FieldRow({
           paddingRight: 28,
         }}
       >
-        {field.label}
+        {field.label}{" "}
+        <span style={{ fontWeight: 400, color: "#666" }}>({field.type})</span>
         {linkCount > 0 ? (
           <span
             data-testid={`field-${field.id}-chip`}
@@ -218,10 +241,11 @@ export function FormRenderer({
   onCancelFieldEdit,
 }: FormRendererProps) {
   const { state, focusTarget } = useActiveState();
-  const [addLabel, setAddLabel] = useState("New field");
+  const [addLabel, setAddLabel] = useState("New attribute");
   const [addType, setAddType] = useState<FieldType>("text");
   const [editLabel, setEditLabel] = useState("");
   const [editType, setEditType] = useState<FieldType>("text");
+  const [filterQuery, setFilterQuery] = useState("");
 
   const handleFocus = (fieldId: string) => {
     const target: EvidenceTarget = { targetType: "form-field", targetId: fieldId };
@@ -234,12 +258,21 @@ export function FormRenderer({
     onBeginEditField?.(field.id);
   };
 
+  const visibleFields = useMemo(
+    () =>
+      schema.fields.filter((field) =>
+        matchesTextFilter(filterQuery, [
+          field.label,
+          field.type,
+          field.id,
+          values?.[field.id],
+        ]),
+      ),
+    [schema.fields, filterQuery, values],
+  );
+
   return (
-    <form
-      data-form-id={schema.id}
-      style={{ padding: 12 }}
-      onSubmit={(e) => e.preventDefault()}
-    >
+    <div data-form-id={schema.id} style={{ padding: 12 }} role="group" aria-label="Attributes">
       <div
         style={{
           display: "flex",
@@ -247,16 +280,41 @@ export function FormRenderer({
           justifyContent: "space-between",
           gap: 8,
           marginBottom: 8,
+          flexWrap: "wrap",
         }}
       >
-        <h2 style={{ fontSize: 14, margin: 0, fontFamily: "system-ui, sans-serif" }}>
+        <h2
+          style={{
+            fontSize: 14,
+            margin: 0,
+            fontFamily: "system-ui, sans-serif",
+            flex: "0 0 auto",
+          }}
+        >
           {schema.title}
         </h2>
+        <input
+          type="search"
+          value={filterQuery}
+          onChange={(e) => setFilterQuery(e.target.value)}
+          placeholder="Filter…"
+          aria-label="Filter attributes"
+          data-testid="attributes-filter"
+          style={{
+            flex: "1 1 100px",
+            minWidth: 80,
+            maxWidth: 160,
+            fontSize: 12,
+            padding: "4px 6px",
+            border: "1px solid #ccc",
+            borderRadius: 4,
+          }}
+        />
         <button
           type="button"
           data-testid="add-field-button"
           onClick={() => {
-            setAddLabel(`New field ${schema.fields.length + 1}`);
+            setAddLabel(`New attribute ${schema.fields.length + 1}`);
             setAddType("text");
             onRequestAddField?.();
           }}
@@ -269,7 +327,7 @@ export function FormRenderer({
             cursor: "pointer",
           }}
         >
-          Add field
+          Add attribute
         </button>
       </div>
 
@@ -286,13 +344,22 @@ export function FormRenderer({
             })
           }
           onCancel={() => onCancelAddField?.()}
-          saveLabel="Add field"
-          badge="New form field"
+          saveLabel="Add attribute"
+          badge="New attribute"
           testidPrefix="field-add"
         />
       )}
 
-      {schema.fields.map((field) => (
+      {visibleFields.length === 0 && schema.fields.length > 0 && (
+        <p
+          style={{ fontSize: 12, color: "#888", margin: "8px 0" }}
+          data-testid="attributes-filter-empty"
+        >
+          No matches.
+        </p>
+      )}
+
+      {visibleFields.map((field) => (
         <FieldRow
           key={field.id}
           field={field}
@@ -319,6 +386,6 @@ export function FormRenderer({
           onCancelEdit={() => onCancelFieldEdit?.()}
         />
       ))}
-    </form>
+    </div>
   );
-}
\ No newline at end of file
+}
diff --git a/src/index.ts b/src/index.ts
index a2e88f4..a0c7754 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -2,8 +2,9 @@ export * from "./repos";
 export * from "./services";
 export * from "./state";
 export * from "./visual-guide";
-export { FormRenderer } from "./FormRenderer";
+export { FormRenderer, matchesTextFilter } from "./FormRenderer";
 export type {
+  FieldDefinitionPatch,
   FormFieldSchema,
   FormRendererProps,
   FormSchema,
diff --git a/src/visual-guide/Overlay.tsx b/src/visual-guide/Overlay.tsx
index aa257bf..e0fa2ad 100644
--- a/src/visual-guide/Overlay.tsx
+++ b/src/visual-guide/Overlay.tsx
@@ -11,10 +11,10 @@
  * `useSyncExternalStore` subscription via `useRectRegistryVersion` picks
  * up that single tick and React re-renders once per frame.
  *
- * Active-only: only the currently active triple is drawn. If any leg's
- * rect is missing (e.g. the viewer hasn't reported a highlight rect for
- * the active annotation yet), that leg is omitted but the other one
- * still renders.
+ * Active-only: draws legs for the active evidence card. Attribute→card
+ * when a Capture attribute is focused; card→highlight whenever the
+ * highlight rect is available (Annotate or Capture). Missing legs are
+ * omitted independently.
  *
  * MVP-sufficient. Future polish: easing the curve direction by source
  * type, animating the transition between active states, dimming
@@ -33,14 +33,6 @@ function rectCenter(rect: DOMRect): { x: number; y: number } {
   return { x: rect.left + rect.width / 2, y: rect.top + rect.height / 2 };
 }
 
-function rectBottomCenter(rect: DOMRect): { x: number; y: number } {
-  return { x: rect.left + rect.width / 2, y: rect.bottom };
-}
-
-function rectTopCenter(rect: DOMRect): { x: number; y: number } {
-  return { x: rect.left + rect.width / 2, y: rect.top };
-}
-
 /**
  * Build a quadratic bezier from `a` to `b` whose control point bulges
  * horizontally between them. The horizontal-bulge style is right for a
@@ -72,18 +64,24 @@ export function Overlay({
   const version = useRectRegistryVersion();
 
   const paths = useMemo<readonly string[]>(() => {
-    if (!state.activeTarget || !state.activeEvidenceItemId) return [];
-    const fieldRect = registry.getRect("field", state.activeTarget.targetId);
+    // CE-WP-0010: card → highlight is enough for Annotate mode (no attribute
+    // target). Field → card still draws when Capture has an active target.
+    if (!state.activeEvidenceItemId) return [];
+    const fieldRect = state.activeTarget
+      ? registry.getRect("field", state.activeTarget.targetId)
+      : null;
     const cardRect = registry.getRect("evidence-card", state.activeEvidenceItemId);
     const highlightRect = state.activeAnnotationId
       ? registry.getRect("highlight", state.activeAnnotationId)
       : null;
     const out: string[] = [];
     if (fieldRect && cardRect) {
-      out.push(bezierPath(rectBottomCenter(fieldRect), rectTopCenter(cardRect)));
+      // Horizontal layout (Evidence | Attributes): centre-to-centre reads better
+      // than the old bottom-strip geometry.
+      out.push(bezierPath(rectCenter(fieldRect), rectCenter(cardRect)));
     }
     if (cardRect && highlightRect) {
-      out.push(bezierPath(rectTopCenter(cardRect), rectCenter(highlightRect)));
+      out.push(bezierPath(rectCenter(cardRect), rectCenter(highlightRect)));
     }
     void version; // memo invalidator
     return out;